Depending on what kind of remarks you are expected to make, you should organize any kind of public speech with an introduction and few key bullet points.

Try using notecards to get yourself organized. In the occasion of a prom, you might consider thanking the people who made the night possible - organizers, volunteers, sponsors, and then recognize the prom royalty that was elected that night, and then encouraging those attending the dance to get home safe. These are ideas to get you started.

Another key strategy for any kind of speech is practice. Pratice what you are going to say at least 4 or 5 times, that way you are much more comfortable when you actually deliver the remarks.

Your closing remarks are your last chance to drive home your ideas. The first major objective of a speech conclusion is to signal the end of the speech. The second objective of a speech conclusion is to reinforce the central idea. You can do this by summarizing the main points of your speech, ending with a quotation, statistic, or unsusual fact, making a dramatic statement, suggestion, or warning, or referring to the introduction.

You can meet the first function of a speech conclusion by: 1) Using brief cues such as "in conclusion" to alert the audience that you are about to conclude. 2) Using a crescendo ending, in which the speech builds in force until it reaches a zenith of power and intensity. 3) Using a dissolve ending, in which the final words fade like a spotlight on a concert singer, bringing the speech to an emotional close.

There are four methods for meeting the second function of a speech conclusion: 1) Summarize the main points of the speech. 2) Conclude with a quotation. 3) End with a dramatic statement. 4) Refer back to the introduction of the speech.

There are four main tips for preparing the conclusion: 1) Keep an eye out for possible concluding materials as you research and develop your speech. 2) Conclude with a bang. Be creative in devising a conclusion that hits the hearts and minds of your audience. 3) Don’t be long-winded. The conclusion will normally make up no more than about 5 to 10 percent of your speech. 4) Don’t leave anything in your conclusion to chance. Work it out in detail, and give yourself plenty of time to practice delivering it.

I think that part of the answer to this question has to lie in what your school articulated as its guidelines and techniques. I think that you would need to gauge the exact role for the closing remarks at Prom. I have previously suggested that the role of these remarks would primarily consist of gratitude. Again, checking with the school would be important. One other element which would be quite valid would be to gauge what others in your school would say if they were in the same position. It is the prom for all of you and reading where their feelings lie could be extremely important here. This might also help you to establish some guidelines or parameters for what should be said at such an occasion.